Rear portion of an automobile



FIG. 1 is a front perspective view of a rear portion of an automobile of our new design;

FIG. 2 is a rear perspective view thereof; ps FIG. 3 is a front view thereof; ps FIG. 4 is a rear view thereof; ps FIG. 5 is a right side view thereof, the left side view being a mirror image thereof, with the exception of the fuel door which is not present on the left side; and,

FIG. 6 is a top plan view thereof.

The portion depicted in light contrast is environment and forms no part of the claimed design. The indicia forms no part of the claimed design. 

The ornamental design for a rear portion of an automobile, as shown and described. 